Is Apple's recent $4 billion component order an OLED purchase?

In Apple's recent financial filings, the company details a $4 billion purchase order with more than a year duration. This purchase order coincides with an "off-balance sheet obligation" for the same amount from the third quarter.

J.P. Morgan's analyst says that this order is related to Apple's long-term OLED sourcing deal from Samsung Display - probably for the next-gen OLED iPhone. J.P. Morgan further connects this order to a comment by Apple that it may have trouble acquiring troublesome components "on commercially reasonable terms". OLEDs indeed are currently supply-strained and Apple needed to make sure it has enough capacity.

$2.6 billion was a rather low amount for 100 million 5.5" flexible OLED displays, and a $4 billion amount makes more sense ($40 per display). This is still just speculation by J.P. Morgan, though, of course...